MOTOR DRIVE SYSTEM AND WASHING MACHINE

PROBLEM TO BE SOLVED: To provide a motor drive system capable of more efficiently switching between low-speed and high-torque output characteristics and high-speed and low-torque output characteristics for controlling.SOLUTION: A motor drive system includes: a motor having an independent n-phase winding; an inverter circuit having arms whose quantity is n and in which each phase output terminal is connected with one end of a winding of a corresponding phase and arms whose quantity is n and in which each phase output terminal is connected with the other end of the winding; and an energization control part which forms an energization signal generating a first energization pattern in which energization on the n-phase winding is performed for each phase and an energization signal generating a second energization pattern in which energization on the n-phase winding is overlapped in time between a plurality of phases, selects the energization signal corresponding to the first and the second energization patterns and supplies the signal to the inverter circuit.SELECTED DRAWING: Figure 1 【課題】低速・高トルク出力特性と、高速・低トルク出力特性とをより効率的に切り換えて制御できるモータ駆動システムを提供する。【解決手段】実施形態のモータ駆動システムは、独立したｎ相の巻線を有するモータと、各相出力端子がそれぞれ対応する相の巻線の一端に接続されるｎ個のアーム，及び各相出力端子がそれぞれ前記巻線の他端に接続されるｎ個のアームを有するインバータ回路と、前記ｎ相の巻線への通電を各相毎に行う第１通電パターンを発生する通電信号と、前記ｎ相の巻線への通電が複数相間で時間的に重複する第２通電パターンを発生する通電信号とを形成し、前記第１及び第２通電パターンに対応する通電信号を選択して前記インバータ回路に供給する通電制御部とを備える。【選択図】図１